骨原细胞（osteogenitor cell）为骨组织的干细胞，位于结缔组织形成的骨外膜及骨内膜贴近骨组织处。
移植后6一8周，两接合端已有骨小梁连接，异体骨皮质周围骨原细胞和成骨细胞生长活跃；
By the 6-8 week, there has been bone trabecula joining the two union sites, osteogenic cell and osteoblast grew briskly around the cortex of allograft.
胎龄30周的股骨远端，骨化中心呈现团块状成群的骨原细胞和成骨细胞，嗜碱性的类骨质填充于细胞间；
At the distal part of femur in fetus age of 30 weeks, a cluster of lump-like osteogenic cell, osteoblast and basophlous osteoid filled among cells appeared at the secondary ossification center.
“巴基鲸”化石由一个原细胞的完整头盖骨所组成，这是现代鲸类祖先中已经灭绝的一个物种。
The fossil consists of a complete skull of an archaeocyte, an extinct group of ancestors of modern cetaceans.
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